Tuesday, November 22, 2016

Split comma separated values in a column to multiple columns in SQL...

In this post I am sharing how to split comma separated values in a column to multiple column in SQL.
In this case, we have a table with two columns. One is with the Code and the other column with the seven number values separated by a comma as Numbers

Code           Numbers
A                10,2,55,5,67,11,45
C                1,32,5,15,7,71,35
--                 ---------------------

The expected output is as below

Code          V1  V2  V3  V4  V5  V6  V7
A                10     2   55    5    67  11   45
C                   1   32    5   15     7   71  35


It can be achieved by using the below query.

SELECT Code, [1] AS [V1],[2] AS [V2],[3] AS [V3],[4] AS [V4],[5] AS [V5],[6] AS [V6],[7] AS [V7]
FROM (
    SELECT *, ROW_NUMBER() OVER (PARTITION BY [Code] ORDER BY (SELECT  null)) as rn
FROM (
    SELECT [Code], [Numbers]
    FROM [SampleTable]
) as a
CROSS APPLY string_split([Numbers],',')
) as SourceTable
PIVOT
(
    MAX([value])
    FOR rn IN ([1],[2],[3],[4],[5],[6],[7])
)as pivotTable

Hope this will be helpful...

Monday, September 19, 2016

Download SQL Server 2016 Developer edition for free...

Use the below link to download SQL Server 2016 Developer edition for free

https://www.microsoft.com/en-us/cloud-platform/sql-server-editions-developers

Also under the Subscription, you can download the some other useful software as shown in the below image, under the Visual Studio Dev Essentials subscription.


Hope this will be helpful.

Thursday, July 28, 2016

#Error while showing DateTime field with Blank or Space in a SSRS Report...

In a SSRS Report, DataSet returns a column which contains datetime values in string data type.
Due to that it contains values with spaces or blank. Let assume the particular field name is "DateValueField".
To show that in the SSRS Report, initially the below expression is used.

=IIf(IsNothing(Fields!DateValueField.Value) OR LTRIM(RTRIM(Fields!DateValueField.Value))="", "", FormatDateTime(Fields!DateValueField.Value, DateFormat.ShortDate))

Eventhough the above expression seems to be correct, when we ran the report, it gives the value as #Error for the rows which contains Blank or Space for the DateValueField.
But it gives the correct value for the rows which contains a valid datetime value.

Actually the issue exists with SSRS IIF expression and to overcome that, we have to modify the IIF expression as below.

=IIf(IsNothing(Fields!DateValueField.Value) OR LTRIM(RTRIM(Fields!DateValueField.Value))="", "", FormatDateTime(IIf(IsNothing(Fields!DateValueField.Value) OR LTRIM(RTRIM(Fields!DateValueField.Value))="", Nothing,Fields!DateValueField.Value), DateFormat.ShortDate))

There may be other situations that the same issue may occur while using IIF expressions.

Monday, January 11, 2016

SSIS Script Component to Trim data in all the columns...

There are situations that we may have large number of input columns and we may need to Trim the data in those. Normally we can use Derived Column component to get done this, but in this scenario it is very difficult due to the large number of columns.
In such scenario it is easy to use Script Component and it can be configured to trim data for any number of input columns.

Solution is as below.


We can have a Script Component to trim data and there are some steps to follow.
We need to select on the required input columns and change the Usage Type of those columns to ReadWrite as below image.


Then click on Edit Script and follow the below steps to add the required code in C#
Add the using System.Reflection; namespace
Then modify the Input0_ProcessInputRow method as below
 public override void Input0_ProcessInputRow(Input0Buffer Row)
    {
        /*
         * Add your code here
         */
        foreach (PropertyInfo p in Row.GetType().GetProperties())
        {
         
           if (object.ReferenceEquals(p.PropertyType, typeof(string)))
            {
                if (p.GetValue(Row, null) != null)
                {
                    p.SetValue(Row, TrimData(p.GetValue(Row, null).ToString()), null);
                }
            }
        }
    }

The TrimData method is below
 public string TrimData(string ValueOfProperty)
    {
        // Uppercase the value
        ValueOfProperty = ValueOfProperty.TrimStart().TrimEnd();
        return ValueOfProperty;
    }


The complete code after those modifications is as below

#region Namespaces
using System;
using System.Data;
using Microsoft.SqlServer.Dts.Pipeline.Wrapper;
using Microsoft.SqlServer.Dts.Runtime.Wrapper;
using System.Reflection;
#endregion

///



/// This is the class to which to add your code.  Do not change the name, attributes, or parent
/// of this class.
///
[Microsoft.SqlServer.Dts.Pipeline.SSISScriptComponentEntryPointAttribute]
public class ScriptMain : UserComponent
{
    ///



    /// This method is called once, before rows begin to be processed in the data flow.
    ///
    /// You can remove this method if you don't need to do anything here.
    ///
    public override void PreExecute()
    {
        base.PreExecute();
        /*
         * Add your code here
         */
     
    }

    ///



    /// This method is called after all the rows have passed through this component.
    ///
    /// You can delete this method if you don't need to do anything here.
    ///
    public override void PostExecute()
    {
        base.PostExecute();
        /*
         * Add your code here
         */
    }

    ///



    /// This method is called once for every row that passes through the component from Input0.
    ///
    /// The row that is currently passing through the component
    public override void Input0_ProcessInputRow(Input0Buffer Row)
    {
        /*
         * Add your code here
         */
        foreach (PropertyInfo p in Row.GetType().GetProperties())
        {
         
            if (object.ReferenceEquals(p.PropertyType, typeof(string)))
            {
                if (p.GetValue(Row, null) != null)
                {
                    p.SetValue(Row, TrimData(p.GetValue(Row, null).ToString()), null);
                }
            }
        }
    }

    // New function that you can adjust to suit your needs
    public string TrimData(string ValueOfProperty)
    {
        // Uppercase the value
        ValueOfProperty = ValueOfProperty.TrimStart().TrimEnd();
        return ValueOfProperty;
    }
}

After that Build the code, save and close it. Then connect the Script Component with the Output source.

This can be used for any number of columns and it will loop though the available input columns and trim the data on those.